Hyperbolic Conservation Laws¶with Umbilic Degeneracy

Hyperbolic Conservation Laws¶with Umbilic Degeneracy
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双曲守恒定律¶与脐简并性

DOI:
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发表时间:
2001
期刊:
影响因子:
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通讯作者:
P. T. Kan
P. T. Kan
中科院分区:
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文献类型:
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作者:
Gui;P. T. Kan

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摘要 我们继续研究具有脐简并性的守恒定律双曲系统。我们进一步将之前建立的紧致性框架扩展到具有孤立脐点的其他规范类二次通量系统。借助该紧致性框架,我们建立了解算子的紧致性和具有大量初始数据的 L ∞ 中熵解的长期行为,并证明了粘性方法以及 Lax-Friedrichs 格式和 Godunov 格式对于典型类具有脐简并性的非线性双曲系统的收敛性。
Abstract We continue to study hyperbolic systems of conservation laws with umbilic degeneracy. We further extend our compactness framework established earlier to other canonical classes of quadratic flux systems with an isolated umbilic point. With the aid of this compactness framework, we establish the compactness of solution operators and the long-time behavior of entropy solutions in L∞ with large initial data, and we prove the convergence of the viscosity method, as well as the Lax-Friedrichs scheme and the Godunov scheme, for a canonical class of nonlinear hyperbolic systems with umbilic degeneracy.